1, 2, 3 & 6
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The GCF is 6.
Since 24 is a factor of 48, all of its factors are common.
2, 3, and 6 are factors common to 18 and 24. The factors of 18 are 1, 2, 3, 6, 9, and 18. The prime factors are 2, 3, 3. The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24. The prime factors are 2, 2, 2, 3. The common factors of 18 and 24 are 1, 2, 3, and 6, and the GCF is 6.
In order to find the common factors of 2 numbers, it is easiest to first list their factors. The factors of 36 are: 1, 2, 3, 4, 6, 9, 12, 18 and 36 The factors of 24 are: 1, 2, 3, 4, 6, 8, 12 and 24. The common factors are the numbers that appear in both lists. These are 1, 2, 3, 4, 6 and 12.
1, 2, 3 and 6